6. A particle moves through a gas at a speed of 15 km/s. How far will it move in 5.5 s? 7. A solution of barium nitrate contains 61.2 g per litre of solution. How many grams of barium nitrate is contained in 2.75l of this solution? 8. Calculate the concentration of 4% KCI solution in; i. B/L ii. ppm ii. Hg/ml 9. A soil has 4 ppm P. Calculate the level of P in i. ppm ii. ppb ii. mg/kg 10.Explain the following concentrations i. 3 ppm sugar solution ii. 4% blood sugar